In /opt/gtk/share/gir-1.0/Pango-1.0.gir we have
<constant name="ATTR_INDEX_FROM_TEXT_BEGINNING"
value="0"
c:type="PANGO_ATTR_INDEX_FROM_TEXT_BEGINNING"
version="1.24">
<doc xml:space="preserve"
filename="pango/pango-attributes.h"
line="262">This value can be used to set the start_index member of a #PangoAttribute
such that the attribute covers from the beginning of the text.</doc>
<source-position filename="pango/pango-attributes.h" line="278"/>
<type name="gint" c:type="gint"/>
</constant>
But PANGO_ATTR_INDEX_TO_TEXT_END seems to be missing. And type gint seems to be wrong, as attribute indices have data type guint.
Are these bugs I should report in issue tracker?